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DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)  [ENDORSED]

Posted: Sat Oct 06, 2018 10:08 am
by Chem_Mod
Greetings Chem 14A students!

My name is Karen Leung, one of your UAs this quarter. For my workshops every Sunday 4-6pm from now on, I will be posting worksheets 1-2 days beforehand (I'll try to have them posted by Friday night, but Saturday by the latest). I created these worksheets as extra practice for every week's material learned. (They are also made to imitate Dr. Lavelle's question styles to the best of my ability!) If you plan on attending my workshops, please bring this worksheet (either printed or available on a computer/tablet). You do not need to complete it, we will go over the problems together during the session.

A breakdown of my workshops:
-Begin with any questions from lecture, homework, modules, etc. anything that anyone wants answered
-Review course material learned in the previous week
-Do practice problems together from my worksheets
-Answer any other lingering questions

The answers to the worksheets will be posted on this SAME post AFTER the session, but no work will be shown, so coming out to the session is necessary to understand the steps of getting to each solution. The worksheets for later weeks (Week 2,3,4..etc) will also be posted on THIS SAME post as well, so you will need to come back to this post every week for each week's worksheets.

Lastly, I have attached our first worksheet in the post below. We will be going over Fundamentals this week. Hope to see you all there! Very excited to meet everyone :))

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sat Oct 06, 2018 1:45 pm
by Javier_Ochoa_DIS_3J
This is perfect! I've been looking for more practice problems. Looking forward to the workshop.

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Oct 07, 2018 1:21 pm
by annabel 2A
Where is the workshop going to be?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Oct 07, 2018 2:21 pm
by MichaelMoreno2G
Are your workshops on Sundays and Sundays only?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Oct 07, 2018 3:49 pm
by Daisylookinland
Would you say that these worksheet problems are somewhat similar to problems we will see on the test? Or do you think doing problems out of the textbook are more helpful in preparing for the test?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Oct 07, 2018 4:19 pm
by 905085650
For balancing chemical equations do we need to show any work?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Oct 07, 2018 9:20 pm
by Chem_Mod
annabel 1 1F wrote:Where is the workshop going to be?


Covel 210. This is on the course website.

MMoreno3K wrote:Are your workshops on Sundays and Sundays only?


Yes they are on Sundays only. Other UAs also have workshops at different day/times, but not every session is identical.

Daisylookinland4B wrote:Would you say that these worksheet problems are somewhat similar to problems we will see on the test? Or do you think doing problems out of the textbook are more helpful in preparing for the test?


I write these problems from experience seeing Dr. Lavelle's exams, and some questions are adapted from his past exams ;)

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Oct 08, 2018 12:19 pm
by Carissa Young 1K
Where are the posted answers for this worksheet?
Thanks

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Oct 08, 2018 2:28 pm
by Chem_Mod
Hello, I've posted the key below for the worksheet on Fundamentals. #8 and #11 work is given since we didn't have enough time to fully go through those problems. Happy Monday!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Oct 08, 2018 3:49 pm
by cara_cavarretta_3F
Is this worksheet and the material included similar to what will be on this week's test?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Oct 08, 2018 5:06 pm
by Nathan Tran 4K
This is very helpful! Thank you for this! I'll make sure to study it, and I look forward to seeing you on Sunday!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Oct 08, 2018 9:20 pm
by Yukta Italia 3I
Thanks so much for this it was really helpful!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Oct 08, 2018 10:56 pm
by 904914909
Thank you! This is really helpful for the first test!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Tue Oct 09, 2018 5:02 pm
by Elle_Mendelson_2K
Are these questions similar to those on the test this week? The worksheet obviously covers the topics on the exam but is the phrasing and level of difficulty similar?
Thank you!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Tue Oct 09, 2018 7:01 pm
by marinhaluza_1
This helped so much! Thank you!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Tue Oct 09, 2018 9:12 pm
by Karishma_1G
I've been looking for more practice!! Thank you so much for posting this - it's very helpful!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Tue Oct 09, 2018 11:51 pm
by Max Kwon 1J
thank you for the extra practice, it's similar to lyndon's

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Wed Oct 10, 2018 10:47 am
by Jordan Lo 2A
Do you know if other UAs will be posting their worksheets? I know that it's best to go to as many peer learning sessions as possible, but I have some class time conflicts and would like to still get a lot of practice work done.

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Wed Oct 10, 2018 5:00 pm
by Samantha Chang 2K
Thank you so much Karen! I was looking for more practice problems <3

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Thu Oct 11, 2018 10:00 pm
by Linyu Zeng 1H
This is great! Thank you!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Fri Oct 12, 2018 1:04 am
by Chem_Mod
jordan_lo_3k wrote:Do you know if other UAs will be posting their worksheets? I know that it's best to go to as many peer learning sessions as possible, but I have some class time conflicts and would like to still get a lot of practice work done.


It's up to the discretion of the UA (ask the UA personally). I advise that if you want to attend a session but cannot make it, get a copy or notes from a friend who can.

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Fri Oct 12, 2018 9:18 pm
by Lucy Agnew 3E
This is going to be so helpful! The more resources the better!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Fri Oct 12, 2018 9:44 pm
by Yiting_Gong_4L
Thank you! This was very helpful!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sat Oct 13, 2018 12:08 am
by Chem_Mod
Week 2 worksheet for this week! We will go over quantum world material up to (not including) debroglie's wavelength.

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sat Oct 13, 2018 5:02 pm
by Jordan Lo 2A
Thank you so much!
Chem_Mod wrote:Week 2 worksheet for this week! We will go over quantum world material up to (not including) debroglie's wavelength.

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sat Oct 13, 2018 5:39 pm
by Brian Cook
Thank you very much, will work on these right away!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Oct 14, 2018 2:26 pm
by 404905747
Thank you very much! This felt like great practice. Is the phrasing and level of difficult really similar to how our quizzes and tests will be?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Oct 14, 2018 6:58 pm
by Chem_Mod
Here is the key for this week's worksheet. Sorry for the confusion with #7 and #8 guys! See the attached document for clarification. (I've attached the steps to the solution for these 2 question; disregard the .095 on #7)

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Oct 14, 2018 11:10 pm
by allisoncarr1i
Thank you so much for these! Is the difficulty level similar to what you'd expect from the exams in this course?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Oct 15, 2018 12:33 pm
by taline_n
Thank you! These are an immense help (especially for studying for the tests)

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Tue Oct 16, 2018 1:24 pm
by 904973729
Thank you! This helps a ton especially since it isn't straight from the textbook.

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Tue Oct 16, 2018 3:36 pm
by Zack Barta 3I
Thanks!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Wed Oct 17, 2018 1:19 am
by 105002507
Thank you very much!! These worksheets are extremely helpful

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Wed Oct 17, 2018 11:00 am
by Cheyenne Ferranti
This is literally gold!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Fri Oct 19, 2018 11:38 am
by 705160853
Wow Thank you

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Fri Oct 19, 2018 6:31 pm
by Adriana_4H
Is this going to be similar to the test next week?? Also what specific concepts do we not need to know other than Schrodinger's equation?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sat Oct 20, 2018 10:53 am
by Chem_Mod
Adriana_4H wrote:Is this going to be similar to the test next week?? Also what specific concepts do we not need to know other than Schrodinger's equation?


As I said, I don't write the exam questions, and these are practice questions made strictly to supplement your understanding of concepts learned in class and how to apply equations. I try to write them so it's similar to exam style questions, but ultimately I don't know if it is similar, you guys will need to tell me ;)

Check Dr. Lavelle's outline of topics you need to know for each chapter on the course website: https://lavelle.chem.ucla.edu/wp-conten ... SYLL_1.pdf

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sat Oct 20, 2018 11:15 am
by Chem_Mod
Here is the worksheet for this week! We will finish reviewing the rest of the quantum world and go over the quantum numbers since it will be on Test 3.

-K

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sat Oct 20, 2018 9:16 pm
by yast_27
Hi!

I was wondering if we should sign up for the peer session as i wanted to attend you session tomorrow,

Thank you very much!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Oct 21, 2018 1:11 pm
by Jocelyne Milke 1G
yast_27 wrote:Hi!

I was wondering if we should sign up for the peer session as i wanted to attend you session tomorrow,

Thank you very much!


I don’t think you need to sign up, I think you can just show up

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Oct 22, 2018 2:36 pm
by Chem_Mod
Hi everyone! I have attached the answer key for my worksheet from yesterday. Happy studying!! :)

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Oct 22, 2018 3:16 pm
by shaunajava2e
thank you these are so helpful!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Oct 22, 2018 5:45 pm
by Brian Cook
For Quantum World Part 2 Worksheet, why is 11 D False?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Oct 22, 2018 8:29 pm
by ariana_apopei1K
Brian Cook wrote:For Quantum World Part 2 Worksheet, why is 11 D False?

I saw it as a trick question with the "always" because higher frequency doesn't matter until the threshold wavelength is reached for the photoelectric experiment. After that, it does matter, but since the wavelength doesn't always reach the minimum size for e- to be ejected, then the frequency doesn't always get to be in play.

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Oct 22, 2018 8:59 pm
by sonalivij
In the first quantum world worksheet for #7, I don't understand where she got .0278 from, because wouldn't you have to add 1/16 to .03456?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Oct 22, 2018 9:32 pm
by Cole Elsner 2J
These really help me out a lot! Practice makes perfect, the more to do the better. Thanks!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Oct 22, 2018 9:50 pm
by ariellasarkissian_3H
For question 7 on worksheet 2, why is it not possible to use the eqn in the book that says v= R(1/ni ^2 - 1/nf^2). I tried this just to see if I got the same answer and I didn't. Why doesn't this work as well, because we are using frequency to get n initial?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Oct 22, 2018 10:38 pm
by Emma Scholes 1L
Can anyone explain how to do number 7 on the Quantum World Worksheet 2 the way Professor Lavelle showed us in class?
Here is the question.
An excited hydrogen atom emits light with a frequency of 1.14 x 10^14 Hz to reach the energy level for which n=4. In what principle quantum level did the electron begin?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Tue Oct 23, 2018 2:46 pm
by annabel 2A
Can someone explain what the statement in #9 of worksheet 3 means? "It is impossible to determine both the speed and position of an electron with absolute uncertainty." Why is it absolute uncertainty and not absolute certainty?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Tue Oct 23, 2018 7:23 pm
by Isabel Nakoud 4D
Many people have asked about #7 on Worksheet 2 and no one has responded.

Can someone please help us out and explain? The key is not clear... How did she get 1/n^2 = 0.0278 ???

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Tue Oct 23, 2018 7:36 pm
by annabel 2A
ariellasarkissian_3H wrote:For question 7 on worksheet 2, why is it not possible to use the eqn in the book that says v= R(1/ni ^2 - 1/nf^2). I tried this just to see if I got the same answer and I didn't. Why doesn't this work as well, because we are using frequency to get n initial?


I think that it works as long as you add a minus sign in front of v to make it -v=R(1/ni^2 - 1/nf^2). Since the hydrogen atom is emitting light, the delta E of the electron is negative, so E=hv is negative.

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Wed Oct 24, 2018 12:02 am
by Jocelyne Milke 1G
annabel 1 1F wrote:Can someone explain what the statement in #9 of worksheet 3 means? "It is impossible to determine both the speed and position of an electron with absolute uncertainty." Why is it absolute uncertainty and not absolute certainty?
It should be with absolute certainty. She corrected the mistake during the session

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Wed Oct 24, 2018 7:58 pm
by Imelda Mena 3I
Hi! Where do these workshops take place? I would like to attend.

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Wed Oct 24, 2018 8:37 pm
by ariana_apopei1K
Imelda Mena 1J wrote:Hi! Where do these workshops take place? I would like to attend.

Covel 210

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Wed Oct 24, 2018 8:40 pm
by Ray Guo 4C
Thank you so much Karen :)

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Wed Oct 24, 2018 8:58 pm
by AvaGordon_4F
I'm a little confused on #7 in the Quantum World Part 1 worksheet. I just can't seem to come up with (1/ni)=0.0278 and I'm not sure why. Could someone explain it to me possibly? I follow her formulas and rationale, I'm just not getting the right numbers...

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Thu Oct 25, 2018 9:29 pm
by ariana_apopei1K
AvaGordon_4F wrote:I'm a little confused on #7 in the Quantum World Part 1 worksheet. I just can't seem to come up with (1/ni)=0.0278 and I'm not sure why. Could someone explain it to me possibly? I follow her formulas and rationale, I'm just not getting the right numbers...

I only get 0.0278 if I have 7.55x10^-20 be negative like someone mentioned above, and it'll be positive because of when you divide by -hR

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Fri Oct 26, 2018 11:49 pm
by Chem_Mod
Hi everyone! I apologize for the lack of response, but I wasn't getting notifications for these posts for some reason - I'm so sorry! But I'm seeing really good discussion here with your classmates which is great! This is probably too late for Test 2... but to answer your questions in preparation for the midterm:

ariana_apopei4I wrote:
AvaGordon_4F wrote:I'm a little confused on #7 in the Quantum World Part 1 worksheet. I just can't seem to come up with (1/ni)=0.0278 and I'm not sure why. Could someone explain it to me possibly? I follow her formulas and rationale, I'm just not getting the right numbers...

I only get 0.0278 if I have 7.55x10^-20 be negative like someone mentioned above, and it'll be positive because of when you divide by -hR


I looked into this problem again and energy should be negative since light was emited. This should then lead you to the correct answer.
Jocelyne Milke 3G wrote:
annabel 1 1F wrote:Can someone explain what the statement in #9 of worksheet 3 means? "It is impossible to determine both the speed and position of an electron with absolute uncertainty." Why is it absolute uncertainty and not absolute certainty?
It should be with absolute certainty. She corrected the mistake during the session


Yes, this was a typo in the question #9. I mean to say with absolute certainty, not uncertainty. (Sorry - worksheets haven't been perfected yet!)

ariana_apopei4I wrote:
Brian Cook wrote:For Quantum World Part 2 Worksheet, why is 11 D False?

I saw it as a trick question with the "always" because higher frequency doesn't matter until the threshold wavelength is reached for the photoelectric experiment. After that, it does matter, but since the wavelength doesn't always reach the minimum size for e- to be ejected, then the frequency doesn't always get to be in play.


Yes. The problem never mentioned anything about the same threshold energy being compared, so higher frequency light doesn't necessarily emit electrons with higher kinetic energies. For example, if I had 2 electrons being emitted but 1 requires a higher threshold energy, it can have less kinetic energy than the other one even if a higher frequency light was used to emit it. Think about the photoelectric effect equation.

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sat Oct 27, 2018 8:09 am
by Chem_Mod
Here is this week's worksheet, we are finishing chapter 2, going over electron configurations and trends in the periodic table.

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Oct 28, 2018 7:23 pm
by Chem_Mod
Hi everyone,

I have attached my notes on periodic table trends since I had to rush through this portion and go over time today. For those of you who needed to leave, I hope the notes will be able to fill you in! Discuss with your classmates (especially those who stayed until the end of the session) if there is anything unclear in them.

I have also attached my version of the worksheet answers due to needing to go over time for the session, but there's not too much work shown since these topics are pretty conceptual. If there is any confusion, bring them to drop in/office hours!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Tue Oct 30, 2018 1:46 pm
by 904983525
Thank you for this. I really need the extra practice.

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Fri Nov 02, 2018 10:27 am
by Sophia Fox 4B
Hi! Can you post the 4th worksheet key? And also do you have a worksheet with more Lewis Structures practice?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Fri Nov 02, 2018 7:59 pm
by Chem_Mod
Sophia Fox 4B wrote:Hi! Can you post the 4th worksheet key? And also do you have a worksheet with more Lewis Structures practice?


Key has been posted above ^ (answers are handwritten)

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Fri Nov 02, 2018 8:06 pm
by Chem_Mod
Happy (approaching) week 6! :D

As preparation for your midterm, I have made a comprehensive worksheet of different material that may show up on the midterm this week. However, we will go over new material that I haven't reviewed in previous weeks first, and if time permits, we will go over the review problems on cumulative material afterwards.

Just like my co-UAs', the questions are modeled after previous test and exam questions, but it may not have everything you need to know. This worksheet is not indicative of the structure, length, or format of the actual midterm :)

I hope to see you all there, come early so you can grab a good seat!

*** EDIT: #11 is NH4+ and NO3-

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Nov 04, 2018 12:06 pm
by Kenan Kherallah 2C
Heyy I was wondering where I can find the answers for worksheet 5 (newest one)? Also for question 9 aren't there more than 2 ions that aren't isoelectronic with F-. I got 4 ions (Li+, Be2+,O-, N2-) that aren't isoelectronic.

Thanks!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Nov 04, 2018 1:46 pm
by Joussie Camacho 4I
Has the key been posted for midterm review worksheet #5?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Nov 04, 2018 2:02 pm
by ariana_apopei1K
Kenan Kherallah 1A wrote:Heyy I was wondering where I can find the answers for worksheet 5 (newest one)? Also for question 9 aren't there more than 2 ions that aren't isoelectronic with F-. I got 4 ions (Li+, Be2+,O-, N2-) that aren't isoelectronic.

Thanks!

I also got this as my answer! I think the answer sheet will be posted tonight after the session is held.

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Nov 04, 2018 3:20 pm
by Jocelyne Milke 1G
Joussie Camacho 4I wrote:Has the key been posted for midterm review worksheet #5?

I think it will be posted after the session ends. (It ends at 6)

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Nov 04, 2018 7:04 pm
by Chem_Mod
Here is the key for the midterm review worksheet! Good luck tomorrow! :)

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Nov 04, 2018 9:51 pm
by Joussie Camacho 4I
Thank you!

For 6.b. isn't it asking for the work energy/ the threshold energy? In the solution, E=hv is used to find energy, but I thought that was energy of the incoming photon and it's asking how much energy is required to remove the electron. So wouldn't you find the kinetic energy of the photon using the given velocity and the mass of an electron and then use the formula (E=hv) - work energy = Ek?

So wouldn't you subtract that 1.66x10^-17 J from the kinetic energy to find the work energy?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Nov 04, 2018 9:58 pm
by Joussie Camacho 4I
For #8, which asks for the full electron configuration of Nitrogen, would 1s^22s^22p^3 be wrong? Do we have to write out 2px^1 2py^1 2pz^1?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Nov 05, 2018 12:10 am
by sonalivij
Joussie Camacho 4I wrote:For #8, which asks for the full electron configuration of Nitrogen, would 1s^22s^22p^3 be wrong? Do we have to write out 2px^1 2py^1 2pz^1?


I don't think so, I believe thats just an easier way to write it to visualize unpaired electrons

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Nov 05, 2018 12:40 am
by Phil Timoteo 1K
Thank you for your help!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Nov 05, 2018 9:30 am
by ariana_apopei1K
Joussie Camacho 4I wrote:Thank you!

For 6.b. isn't it asking for the work energy/ the threshold energy? In the solution, E=hv is used to find energy, but I thought that was energy of the incoming photon and it's asking how much energy is required to remove the electron. So wouldn't you find the kinetic energy of the photon using the given velocity and the mass of an electron and then use the formula (E=hv) - work energy = Ek?

So wouldn't you subtract that 1.66x10^-17 J from the kinetic energy to find the work energy?

I think since it tells you the freq (2.50x10^16 Hz) youre looking for the energy of the photon that will reach that threshold. I also thought I had to do the work energy but the energy of the photon must at least equal the work function for the e- to be ejected, so you'd just find the E of the photon.

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Nov 05, 2018 10:53 am
by JiangJC Dis2K
Thank you Karen! This is super helpful for preparing for the midterm today!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Nov 05, 2018 12:39 pm
by Daisylookinland
On the midterm review worksheet, could someone explain how to draw the lewis structure for XeO2F2?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Nov 05, 2018 1:26 pm
by Kassidy Tran 1E
Daisylookinland4B wrote:On the midterm review worksheet, could someone explain how to draw the lewis structure for XeO2F2?

Xe should be the center atom, with 2 F's and 2 O's attached to it. The total number of electrons should be 34e-, so there should be one bond between Xe and the F's, and each F should have 3 lone pairs, since F is unlikely to form a double bond. Each O should have 2 lone pairs and two double bonds to Xe to minimize formal charge. Since there's still 2 electrons left, you can place them as a lone pair on Xe, since Xe has an expanded octet and can hold more than 8 electrons.

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sat Nov 10, 2018 2:28 pm
by Josephine Lu 4L
Hi Karen! Will you still be holding a workshop this Sunday (over Veteran's Day weekend)?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Nov 11, 2018 9:31 am
by Chem_Mod
Josephine Lu 1L wrote:Hi Karen! Will you still be holding a workshop this Sunday (over Veteran's Day weekend)?


Yes, all sessions in Covel 210 will be running as normal. Worksheet will be posted in a bit. Sorry for the delay!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Nov 11, 2018 2:19 pm
by Chem_Mod
Hello everyone, here is the worksheet for my workshop later today. Today will be a brief session finishing up properties of chemical bonds and going over VSEPR structures. (should be a quick and simple session!) I will be saving hybridization topics to go over next week, since I am expecting people to be off campus this weekend.

Hope everyone is having a great long weekend!

Best,
Karen

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Nov 11, 2018 2:34 pm
by Roni Touboul
Thank you Karen! this was very helpful for the midterm.

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Tue Nov 13, 2018 1:01 pm
by Aj1156
Thank you again! These are always so helpful. When will you be posting the answer key to worksheet 6?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Wed Nov 14, 2018 11:20 am
by Chem_Mod
Here's the key for Sunday's worksheet.

There were a lot of questions on polarizability, and I found this link to be a decent resource:
http://wwwchem.uwimona.edu.jm/courses/C ... ajans.html

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sat Nov 17, 2018 10:49 pm
by Chem_Mod
Last week we left off on hybridization, which we will go over this week and will be on Test 3. I will NOT be holding workshops over Thanksgiving break, which means that I will not see you all until after Test 3. However, I should have covered everything that will be on Test 3 by tomorrow.

Almost there!

-K

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Nov 18, 2018 1:59 pm
by Liza Hayrapetyan-3K
Thank you so much! When will you be posting the key for this worksheet?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Nov 18, 2018 4:23 pm
by kimberlyrose1G
Chem_Mod wrote:Last week we left off on hybridization, which we will go over this week and will be on Test 3. I will NOT be holding workshops over Thanksgiving break, which means that I will not see you all until after Test 3. However, I should have covered everything that will be on Test 3 by tomorrow.

Almost there!

-K


Thank you for posting this week's worksheet, is there any way you can post the solutions by Monday. Also, can you create/post a list of important topics to study for Test 3? Thank you once again!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Nov 18, 2018 5:12 pm
by Chem_Mod
Key for Week 7's worksheet. Have a great Thanksgiving break everyone!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Nov 18, 2018 8:38 pm
by yaosamantha4F
Thank you again for posting these worksheets!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Nov 18, 2018 11:40 pm
by Josephine Lu 4L
Hello Karen! If you went over any notes (wrote stuff on the board) on Sunday, could you please send those notes? Thank you so much!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Nov 19, 2018 3:15 pm
by Chem_Mod
Josephine Lu 1L wrote:Hello Karen! If you went over any notes (wrote stuff on the board) on Sunday, could you please send those notes? Thank you so much!


My notes are supplementary to my workshops and require attendance to fully understand since I do verbally explain more than I write down in my notes. Thus to avoid confusion with students who did not attend, I do not post my notes unless there were special circumstances (went over time during session, held during holiday weekend, etc.), and even then, I rewrite them more detailedly and comprehensively when I do post them. Your best shot is probably to ask a classmate who did attend and took notes if you do find notes from my session helpful!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Nov 25, 2018 10:03 am
by Karla_Ocampo 4E
Thank you very much for these worksheets!!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Nov 25, 2018 3:15 pm
by Zack Barta 3I
thanks!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Nov 25, 2018 3:16 pm
by Zack Barta 3I
Thanks!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Nov 25, 2018 3:16 pm
by Zack Barta 3I
thanks!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Nov 25, 2018 7:25 pm
by uhedlund
Thank you so much--this is so helpful!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Sun Nov 25, 2018 8:15 pm
by Esther Lee 4H
thank you!!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Nov 26, 2018 12:17 pm
by Letizia Ye 4F
These are so helpful, thank you!

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Nov 26, 2018 12:27 pm
by Riya Shah 4H
Is there any worksheet for test 3?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Nov 26, 2018 1:31 pm
by Angela Cordova 3F
These worksheets have helped me so much on the tests, will there be any covering the topics for Test 3?

Re: DOWNLOAD SESSION WORKSHEETS HERE - Sundays 4-6pm (Karen)

Posted: Mon Nov 26, 2018 1:33 pm
by Carolina Lechuga
Riya Shah 4A wrote:Is there any worksheet for test 3?


I believe worksheet 6 and 7 help with test 3 since it has the material that the test is going to cover but she said she won't be giving a specific worksheet for test 3 since the past 2 are enough. These worksheets are really helpful and if you scroll up, they're easy to find.